That No Neck Blues Explosion 7" was indeed a hoax - it was done by the two principal minds behind the fanzine Tuba Frenzy, who were also in the band Joby's Opinion...some '90s Chapel Hill, NC ephemera. One of them told me he sent a copy to - I think - David Nuss at the time, and he wasn't too amused.

no neck blues band is consistent as fuck. those dudes were doing the fucked up psych freak folk thing years before the 'new wierd america' thing happened, and doin it better than any of those bands. well maybe not 6 organs. id love to hear this though.

It's not them...I remember when this came out, and I asked 'em about it. They were kinda annoyed by the whole thing. I DO have a copy though (just came across it in the basement). It's a decent listen, but defitely not them.
Now, if you can get your hands on any of the K. Salvatore stuff, I recommend it.